Supplying Power To An External Device - Sony BC-L120 Operation Manual

Supplying power to an external device

Use an optional DC connecting cable to connect the charger to
the DC power input connector of the device.
Note
The unit cannot charge a battery pack at the same time it
supplies DC power to an external device. If you begin using
the unit to supply power to an external device while charging a
battery pack, the charging stops.
11(EN)